Radix Bupleurum is the dried root of Radix Bupleurum, family Umbelliferae. It mainly contains active ingredients such as bupleurum saponin, volatile oil, flavonoids, sterols and polysaccharides. It is pungent and bitter in taste and slightly cold in nature. It belongs to the liver, gallbladder and lung meridians, and has the effects of dispersing and reducing heat, relieving depression in the liver, and raising the yang and lifting the traps. The main function of Bupleurum is to clear heat and relieve symptoms, and is used to treat fever caused by colds, influenza and malaria. Chai Hu suppresses cough and is used for cough and bronchitis caused by colds. Chai Hu compound preparation for acute and chronic hepatitis is very effective in improving symptoms, retracting the enlarged liver and spleen and restoring liver function. For hyperlipidemia, a decoction of Chai Hu mixed with an appropriate amount of Luo Han Guo can bring down blood lipids.